<template>
  <div style="display: flex">
    <div>
      <div>
        <el-select
          v-model="keywords"
          filterable
          remote
          reserve-keyword
          placeholder="请输入关键词"
          :remote-method="remoteMethod"
          :loading="loading"
          :clearable="true"
          size="mini"
          @change="currentSelect"
          style="width: 500px"
        >
          <el-option
            v-for="item in options"
            :key="item.id"
            :label="item.name"
            :value="item"
            class="one-text"
          >
            <span style="float: left">{{ item.name }}</span>
            <span style="float: right; color: #8492a6; font-size: 13px">{{
              item.district
            }}</span>
          </el-option>
        </el-select>
      </div>
      <div id="container" class="container"></div>
    </div>
    <div class="info-box">
      纬度：{{ form.lat }}
      <br />
      经度：{{ form.lng }}
      <p>详细地址：{{ form.address }}</p>
    </div>
  </div>
</template>

<script>
import AMapLoader from "@amap/amap-jsapi-loader";
window._AMapSecurityConfig = {
  // 安全密钥
  // securityJsCode: "3c8aeaa0909f41910d6e356a51ac3ec8",
  securityJsCode: "dde8a447f47129adb636ae0613f3b361",
};
export default {
  name: "TestIndex",
  data() {
    return {
      // 地图实例
      map: null,
      // 标记点
      marker: "",
      // 地址逆解析
      geoCoder: null,
      // 搜索提示
      AutoComplete: null,
      // 搜索关键字
      keywords: "",
      // 位置信息
      form: {
        lng: "",
        lat: "",
        address: "",
        addressShort: "",
        adcode: "", //地区编码
      },
      // 搜索节流阀
      loading: false,
      // 搜索提示信息
      options: [],
    };
  },
  methods: {
    initMap() {
      AMapLoader.load({
        // 你申请的Key
        // key: "efbd1fd7814b7dae079c2ce259edb788",
        key: "bdd388b07f38f875020c0196d71b65d8",
        version: "2.0",
        // 需要用到的插件
        plugins: ["AMap.Geocoder", "AMap.AutoComplete"],
      })
        .then((AMap) => {
          this.map = new AMap.Map("container", {
            viewMode: "2D", //是否为3D地图模式
            zoom: 13, //初始化地图级别
            center: [116.39748, 39.909197], //初始化地图中心点位置
          });
          //地址逆解析插件
          this.geoCoder = new AMap.Geocoder({
            city: "全国", //城市设为北京，默认：“全国”
            radius: 1000, //范围，默认：500
          });
          // 搜索提示插件
          this.AutoComplete = new AMap.AutoComplete({ city: "全国" });
          //点击获取经纬度;
          this.map.on("click", (e) => {
            // 获取经纬度
            this.form.lng = e.lnglat.lng;
            this.form.lat = e.lnglat.lat;
            // 清除点
            this.removeMarker();
            // 标记点
            this.setMapMarker();
          });
        })
        .catch((err) => {
          // 错误
          console.log(err);
        });
    },
    // 标记点
    setMapMarker() {
      // 自动适应显示想显示的范围区域
      this.map.setFitView();
      this.marker = new AMap.Marker({
        map: this.map,
        position: [this.form.lng, this.form.lat],
      });
      // 逆解析地址
      this.toGeoCoder();
      this.map.setFitView();
      this.map.add(this.marker);
    },
    // 清除点
    removeMarker() {
      if (this.marker) {
        this.map.remove(this.marker);
      }
    },
    // 逆解析地址
    toGeoCoder() {
      let lnglat = [this.form.lng, this.form.lat];
      this.geoCoder.getAddress(lnglat, (status, result) => {
        if (status === "complete" && result.regeocode) {
          this.form.address = result.regeocode.formattedAddress;
          this.form.addressShort = this.compareStrings(result.regeocode.formattedAddress, result.regeocode.addressComponent.province + result.regeocode.addressComponent.city + result.regeocode.addressComponent.district);
          this.form.adcode = result.regeocode.addressComponent.adcode
        }
      });
    },
    // 搜索
    remoteMethod(query) {
      if (query !== "") {
        this.loading = true;
        setTimeout(() => {
          this.loading = false;
          this.AutoComplete.search(query, (status, result) => {
            this.options = result.tips;
          });
        }, 200);
      } else {
        this.options = [];
      }
    },
    // 选中提示
    currentSelect(val) {
        console.log(val)
      // 清空时不执行后面代码
      if (!val) {
        return;
      }
      this.form = {
        lng: val.location.lng,
        lat: val.location.lat,
        address: val.district + val.address,
        addressShort: val.address,
        adcode: val.adcode,
      };
      // 清除点
      this.removeMarker();
      // 标记点
      this.setMapMarker();
    },
    compareStrings(s1, s2) {
      let res = "";
      const len = Math.min(s1.length, s2.length);
      for(let i = 0; i < len; i++) {
        if(s1[i] !== s2[i]) {
          res += s1[i];
        }
      }
      if(s1.length > s2.length) {
        res += s1.slice(len);
      } else if(s2.length > s1.length) {
        res += s2.slice(len);
      }
      return res;
    }
  },
  mounted() {
    this.initMap();
  },
};
</script>

<style>
.container {
  width: 500px;
  height: 300px;
}
</style>
